From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4778320B33 for ; Mon, 6 Nov 2023 13:23:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0lYzirMk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6FE8C433C9; Mon, 6 Nov 2023 13:23:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1699277002; bh=u95qJ8ePzO4ixpfQ3W/QMAOcIA4jES15Cti1DbOjErc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0lYzirMk0KGhTm49camBStmBsSP5bDm4x8/N8I/IHMjQRUPqhzBY9s8fG5m6xoMhA PIVeocz419xlgnllTZNMykVOkjtMAeM5qlKDzNCjMtJUsYCwSYWaPJNKrkNirUZZs4 +vrnXwzoBRFjAwiEomgWszwuzqi4TRj3WL54jCEY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "William A. Kennington III" , Mark Brown , Sasha Levin Subject: [PATCH 5.4 56/74] spi: npcm-fiu: Fix UMA reads when dummy.nbytes == 0 Date: Mon, 6 Nov 2023 14:04:16 +0100 Message-ID: <20231106130303.658944833@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231106130301.687882731@linuxfoundation.org> References: <20231106130301.687882731@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: William A. Kennington III [ Upstream commit 2ec8b010979036c2fe79a64adb6ecc0bd11e91d1 ] We don't want to use the value of ilog2(0) as dummy.buswidth is 0 when dummy.nbytes is 0. Since we have no dummy bytes, we don't need to configure the dummy byte bits per clock register value anyway. Signed-off-by: "William A. Kennington III" Link: https://lore.kernel.org/r/20230922182812.2728066-1-william@wkennington.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-npcm-fiu.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-npcm-fiu.c b/drivers/spi/spi-npcm-fiu.c index 1e770d6739050..cc4e29cd86dab 100644 --- a/drivers/spi/spi-npcm-fiu.c +++ b/drivers/spi/spi-npcm-fiu.c @@ -334,8 +334,9 @@ static int npcm_fiu_uma_read(struct spi_mem *mem, uma_cfg |= ilog2(op->cmd.buswidth); uma_cfg |= ilog2(op->addr.buswidth) << NPCM_FIU_UMA_CFG_ADBPCK_SHIFT; - uma_cfg |= ilog2(op->dummy.buswidth) - << NPCM_FIU_UMA_CFG_DBPCK_SHIFT; + if (op->dummy.nbytes) + uma_cfg |= ilog2(op->dummy.buswidth) + << NPCM_FIU_UMA_CFG_DBPCK_SHIFT; uma_cfg |= ilog2(op->data.buswidth) << NPCM_FIU_UMA_CFG_RDBPCK_SHIFT; uma_cfg |= op->dummy.nbytes << NPCM_FIU_UMA_CFG_DBSIZ_SHIFT; -- 2.42.0